M I think that is usually exactly what happens! I was totally out just to have fun and get out of the house when I met my (awesome) bf. I was dating several people casually and was pretty determined not to become attached to anyone.
When I went on my first date with bf we hit it off and it was like we had known each other for a long time and already were friends. I still continued to date other people and told him he was free to do the same. After several dates and talking on the phone every day we both knew that we didn't want to date anyone else. We are so compatible that it is scary! Lots of similarities in personality and just other stuff like we are both left handed, etc. Now that it has been almost a year, we will have funny stuff happen like we will be in he grocery store and be in two separate aisles and pick up the identical items for dinner or whatever. It is too funny!
As a matter of fact, he had given up on dating and just kinda sent me the email as a last ditch effort and didn't really expect anything back.
It's like when you stop looking, the right person will be sent to you!
"Success is the sum of small efforts, repeated day in and day out." Robert Collier
"One's best success often comes after their greatest disappointments." Henry Ward Beecher